ESP-IDF
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Outline
#include "esp_netif.h"
#include "sys/queue.h"
#include "esp_log.h"
#include "esp_netif_private.h"
#include <string.h>
TAG
slist_netifs_s
slist_netifs_s
slisthead
s_head
s_esp_netif_counter
IP_EVENT
esp_netif_add_to_list_unsafe(esp_netif_t *)
esp_netif_remove_from_list_unsafe(esp_netif_t *)
esp_netif_get_nr_of_ifs()
esp_netif_next(esp_netif_t *)
esp_netif_next_unsafe(esp_netif_t *)
esp_netif_is_netif_listed(esp_netif_t *)
esp_netif_get_handle_from_ifkey_unsafe(const char *)
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/esp_netif/esp_netif_objects.c
 
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/* * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include "esp_netif.h" #include "sys/queue.h" #include "esp_log.h" #include "esp_netif_private.h" #include <string.h>5 includes // // Purpose of this module is to provide list of esp-netif structures // - this module has no dependency on a specific network stack (lwip) // static const char *TAG = "esp_netif_objects"; typedef struct slist_netifs_s slist_netifs_t; struct slist_netifs_s { esp_netif_t *netif; SLIST_ENTRY(slist_netifs_s) next; }{ ... }; SLIST_HEAD(slisthead, slist_netifs_s) s_head = { .slh_first = NULL, }; static size_t s_esp_netif_counter = 0; ESP_EVENT_DEFINE_BASE(IP_EVENT); // // List manipulation functions // esp_err_t esp_netif_add_to_list_unsafe(esp_netif_t *netif) { struct slist_netifs_s *item = calloc(1, sizeof(struct slist_netifs_s)); ESP_LOGV(TAG, "%s %p", __func__, netif); if (item == NULL) { return ESP_ERR_NO_MEM; }{...} item->netif = netif; SLIST_INSERT_HEAD(&s_head, item, next); ++s_esp_netif_counter; ESP_LOGD(TAG, "%s netif added successfully (total netifs: %" PRIu32 ")", __func__, (uint32_t)s_esp_netif_counter); return ESP_OK; }{ ... } esp_err_t esp_netif_remove_from_list_unsafe(esp_netif_t *netif) { struct slist_netifs_s *item; ESP_LOGV(TAG, "%s %p", __func__, netif); SLIST_FOREACH(item, &s_head, next) { if (item->netif == netif) { SLIST_REMOVE(&s_head, item, slist_netifs_s, next); assert(s_esp_netif_counter > 0); --s_esp_netif_counter; ESP_LOGD(TAG, "%s netif successfully removed (total netifs: %" PRIu32 ")", __func__, (uint32_t)s_esp_netif_counter); free(item); return ESP_OK; }{...} }{...} return ESP_ERR_NOT_FOUND; }{ ... } size_t esp_netif_get_nr_of_ifs(void) { return s_esp_netif_counter; }{ ... } // This API is inherently unsafe // suggest that users call from esp_netif_tcpip_exec() esp_netif_t* esp_netif_next(esp_netif_t* netif) { return esp_netif_next_unsafe(netif); }{ ... } esp_netif_t* esp_netif_next_unsafe(esp_netif_t* netif) { ESP_LOGV(TAG, "%s %p", __func__, netif); struct slist_netifs_s *item; // Getting the first netif if argument is NULL if (netif == NULL) { item = SLIST_FIRST(&s_head); return (item == NULL) ? NULL : item->netif; }{...} // otherwise the next one (after the supplied netif) SLIST_FOREACH(item, &s_head, next) { if (item->netif == netif) { item = SLIST_NEXT(item, next); return (item == NULL) ? NULL : item->netif; }{...} }{...} return NULL; }{ ... } bool esp_netif_is_netif_listed(esp_netif_t *esp_netif) { struct slist_netifs_s *item; SLIST_FOREACH(item, &s_head, next) { if (item->netif == esp_netif) { return true; }{...} }{...} return false; }{ ... } esp_netif_t *esp_netif_get_handle_from_ifkey_unsafe(const char *if_key) { struct slist_netifs_s *item; SLIST_FOREACH(item, &s_head, next) { esp_netif_t *esp_netif = item->netif; if (strcmp(if_key, esp_netif_get_ifkey(esp_netif)) == 0) { return esp_netif; }{...} }{...} return NULL; }{ ... }
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